There are about 4000 snake species in the world. The largest snake family are colubrids. It contains approximately 2000 species. Many colubrids are technically venomous with rear fangs, but very few are considered dangerous to humans. Elapids and vipers are the main venomous snake families in the world, both have about 350 species. From all snake species there are only about 300 venomous species that can kill a human with a single bite. #livingzoology #venomoussnakes #snakephotography #snakes #s